Learn More About the IAAO...

IAAO is a nonprofit, educational, and research association. It is a professional membership organization of government assessment officials and others interested in the administration of the property tax. IAAO was founded in 1934, and now has a membership of more than 8,000 members worldwide from governmental, business, and academic communities. Sign up for our electronic newsletter, Assessing Info, to stay up-to-date on industry events and news from around the world.


IAAO offers a number of educational programs in a variety of formats to help members continue their professional development.

  • Five-day courses (live, live online and self-study)
  • On-demand online workshops
  • One to three day programs
  • One-day forums
  • Designations

See More about Education


  • Research Library of 18,000 books, articles, government documents, reports, and conference proceedings as well as various directories and subject guides on appraisal and assessment.
  • IAAO magazine, journal, and e-newsletter following issues of interest to the industry.
  • Consulting service for jurisdictions to bring a fresh perspective to assessment problems.

See More About Resources



IAAO offers numerous programs allowing members to network, learn about industry issues, and find out about new products from industry partners.

  • International Conference on Assessment Administration
  • GIS / Valuation Technologies Conference
  • Mass Appraisal Valuation Symposium
  • Annual Legal Seminar

See More About Networking


Membership in IAAO can help you continue further your career, pursue leadership opportunities, and make a difference in your community.

See More About Membership


IAAO offers a Career Center offering employers and job seekers information and listings about current openings in the industry.

Enter Career Center